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| Mirrors > Home > MPE Home > Th. List > Mathboxes > islan2 | Structured version Visualization version GIF version | ||
| Description: A left Kan extension is a universal pair. (Contributed by Zhi Wang, 4-Nov-2025.) |
| Ref | Expression |
|---|---|
| islan.r | ⊢ 𝑅 = (𝐷 FuncCat 𝐸) |
| islan.s | ⊢ 𝑆 = (𝐶 FuncCat 𝐸) |
| islan.k | ⊢ 𝐾 = (〈𝐷, 𝐸〉 −∘F 𝐹) |
| Ref | Expression |
|---|---|
| islan2 | ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 → 𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | islan.r | . . 3 ⊢ 𝑅 = (𝐷 FuncCat 𝐸) | |
| 2 | islan.s | . . 3 ⊢ 𝑆 = (𝐶 FuncCat 𝐸) | |
| 3 | islan.k | . . 3 ⊢ 𝐾 = (〈𝐷, 𝐸〉 −∘F 𝐹) | |
| 4 | 1, 2, 3 | islan 49607 | . 2 ⊢ (〈𝐿, 𝐴〉 ∈ (𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋) → 〈𝐿, 𝐴〉 ∈ (𝐾(𝑅 UP 𝑆)𝑋)) |
| 5 | df-br 5103 | . 2 ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 ↔ 〈𝐿, 𝐴〉 ∈ (𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)) | |
| 6 | df-br 5103 | . 2 ⊢ (𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴 ↔ 〈𝐿, 𝐴〉 ∈ (𝐾(𝑅 UP 𝑆)𝑋)) | |
| 7 | 4, 5, 6 | 3imtr4i 292 | 1 ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 → 𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 〈cop 4591 class class class wbr 5102 (class class class)co 7369 FuncCat cfuc 17887 UP cup 49155 −∘F cprcof 49355 Lan clan 49587 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-ov 7372 df-oprab 7373 df-mpo 7374 df-1st 7947 df-2nd 7948 df-func 17800 df-lan 49589 |
| This theorem is referenced by: lanrcl5 49617 |
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